@neodawg I can say for legacy, SANBOOT is the default. BUT if grub is working for you (no reason why it shouldn’t), then continue to use it. Just the default is SANBOOT. Some (funky) computers don’t like the sanboot method, so what ever works the best for you is the right one.

@neodawg You can set the global fog exit mode for uefi to rEFInd since that one works the best on most systems with uefi firmware. Then for the one off systems where it doesn’t work then update the host configuration accordingly.